elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

Incipient Melting and Corrosion Properties of Friction Stir Welded AA2024 T3 Joints

Alfaro Mercado, Ulises und Biallas , Gerhard (2010) Incipient Melting and Corrosion Properties of Friction Stir Welded AA2024 T3 Joints. 12th International Conference on Aluminium Alloys (ICAA 12), 5.-9. September 2010 , Yokohama, Japan. ISBN 978-4-905829-11-9.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Kurzfassung

The effect of welding speed on strength and corrosion behavior of FSW 2024-T3 joints was investigated in the present study. For both strength and corrosion, the transition from the thermo-mechanically affected to the heat affected zone (TMAZ/HAZ) turned out to be the most critical site. Higher welding speeds produced both a smaller hardness drop in the TMAZ/HAZ and a smaller width of the softened zone. Thereby, tensile strength could be improved and the intergranular corrosion attack localized to the overaged TMAZ/HAZ could be reduced. Paradoxically, at lower heat input (i.e. at higher welding speed), the weld nugget region also suffered enhanced intergranular corrosion. SEM examinations of the top surface of FSW 2024-T3 joints revealed the presence of constitutionally melted Al2MgCu (S-phase) particles in that region. The S-phases were mainly localized to the advancing side of the joint, and their volume fraction increased with growing welding speed. Hence it is suggested that a focalization of the thermal source resulted in incipient melting. Eutectic S-phases were formed and served as preferential corrosion sites lowering corrosion resistance of the weld nugget.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Incipient Melting and Corrosion Properties of Friction Stir Welded AA2024 T3 Joints
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Alfaro Mercado, Ulisesulises.alfaro@dlr.de
Biallas , GerhardGerhard.Biallas@haw-hamburg.de
Datum:September 2010
Seitenbereich:Seiten 978-983
ISBN:978-4-905829-11-9
Status:veröffentlicht
Stichwörter:FSW, Constitutional melting, Corrosion
Veranstaltungstitel:12th International Conference on Aluminium Alloys (ICAA 12)
Veranstaltungsort:Yokohama, Japan
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:5.-9. September 2010
Veranstalter :The Japan Institute of Light Metals
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturen & Werkstoffe
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Werkstoff-Forschung > Metallische Strukturen und hybride Werkstoffsysteme
Hinterlegt von: Ulises Alfaro Mercado
Hinterlegt am:13 Dez 2010 09:44
Letzte Änderung:13 Dez 2010 09:46

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.